Administration and Provisioning
Issue 8.0 July 2002
8-115
— The Output AU4 Mapping parameter sets the AU4 mapping bit to
SONET or SDH. The OC12 circuit pack can automatically support
transport of:
■ One STS-12c signal
■ Twelve STS-1 signals, or STM-1 signals carrying AU-4
mapped signals. For STM-1 AU-4 mapped payloads, the
OC12 circuit pack can be provisioned to output the
appropriate values in the pointer bytes so that direct interface
to SDH equipment is possible over an STM-1 optical
interconnection. The high-speed transport of the payload is
SONET, but this does not present any operational difficulties.
"SONET" indicates the transport of an OC-12 signal. "SDH"
indicates the transport of an AU4 signal.
■ Four STS-3 or STS-3c signals
■ A combination of STS-1 and STS-3/STS-3c signals that add
up to the equivalent of 622.08 MB/s.
■ CONFIGURATION-Set-OC3 (TL1 = ENT-rr): This input sets the
Protection Mode, Alarm Level, Signal Degrade Threshold and Output AU4
Mapping of the OC-3 line. This input sets the provisioned protection mode
parameters successfully even if the slot associated with the addressed slot
pair is not equipped with an OC3 circuit pack or is in the AUTO state.
— The Protection Mode (from OC3) parameter sets the protection
mode of a low-speed interface slot to "1+1" or "0x1" in the add
direction (from OC-3 to OC-48). The "1+1" protection mode is
provided by using a pair of adjacent "A" and "B" low-speed interface
slots (for example, slot 2A and 2B). Each "1+1" protected OC3
circuit pack pair establishes an active cross-connection between
one slot (or port) of the slot pair and an STS-3 (or STS-1) tributary,
and a standby cross-connection between the other slot (or port) and
the same tributary.
To implement the OC3 operating protection mode, the following
condition must exist:
■ Both slots in the slot pair must be provisioned "1+1"
■ Both slots in the slot pair must be EQ
■ A cross-connection must exist between either slot (or port) in
the slot pair and an STS-3 (or STS-1) tributary.
— The Protection Mode (from OC48) parameter sets the protection
mode of a low-speed interface slot to "1+1" or "0x1" in the drop
direction (from OC-48 to OC-3). The "1+1" protection mode is
provided by using a pair of adjacent "A" and "B" low-speed interface
slots. For a "1+1" protected OC3 circuit pack pair, the STS-3
tributary feeds the low-speed signal to both slots.
To Next Page
Loading...